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A271436 as a simple table

n a(n)
1 0
2 0
3 12
4 1629
5 153984
6 16992846
7 2653292322
8 639869193777
9 247683857110080

[0,0,12,1629,153984,16992846,2653292322,
 639869193777,247683857110080]

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Last modified August 14 04:13 EDT 2020. Contains 336477 sequences. (Running on oeis4.)